"Here's an opening!" cried the small youth, enthusiastically. "Oh, if only we can make it large enough!"
"We must make it large enough!" cried Shep, and then all went to work with vigor, pulling back such rocks as they could move and digging at the dirt with their bare hands. They had to make a regular tunnel ten or more feet long and it took them over an hour to do it. Their arms and backs ached from the labor, and their hands were scratched and their finger nails torn, but to all this they paid no attention. Their sole thought was to get out of the cave that looked as if it might become their tomb.
At last the opening was large enough to admit of the passage of Whopper's body and he passed to the outside. Then he dug from that end, and presently Shep came forth, followed by Giant and lastly by Snap.
"Thank heaven we are out of that!" murmured the doctor's son, and his chums echoed his sentiment. Never had the outer world appeared so glorious to them. At that instant they were all ready to vow they would never enter a cave again.
It was still raining, and the day was fast drawing to a close. The lightning and thunder had gassed away to the westward, but they knew the
